Stove.



' W. R. YBNDALL, JR-

7 STOVE. APPLICATION FILED 001". 29, 1906.

Patented Sept. 29, 1 908.

2 SHEETS-SHEET 1.

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w. R. YBNDALL, JR. STOVE. APPLICATION FILED OCT. 29, 19.06.

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Patented Sept. 29, I908.

, UNITED STATES PATENT OFFICE. A

WILLIAM ROBERT :Y ALL, m, or AURORA, ILLINOIS.

To all whom it may concern:

Be it known that I, WILLIA'MR. YEN'nAIQIQ,

Jr., a citizen of the United States,- residing at Aurora, in the county oflKane and State of Illinois, have invented certain new-and useful Improvements in Stoves; andIdo hereby declare the following to be a.full,rclear, and

exact description of'the invention, such as the efliciency of the stove is greatly increased,

by completelycovering all interior or indirect radiating surfaces'thereof, with circulating flues, by means of which currents of cool air are caused to circulate over said interior.

surfaces and thereby convert them into direct radiating surfaces. 7 i M My invention consists of further details of construction and the combination of parts as will be hereinafter described and more specifically claimed. l p

In the accompanying drawings, illustrat ing the preferred embodiment of my invention: Figure 1 is aside elevation of a stove constructed in accordance with my invention. Fig. 2 is a longitudinal vertical sectional view thereof. Fig. 3 is a vertical sectional view taken on line 0cac of Fig. 2 and looking in the direction of the arrow. Fig. 4 is a horizontal sectional view taken on line y'y of Fig. 2. Fig. 5 is a similar view on line 2-2 of Fig. 2. Fig. 6 is a sectional view on linear-0t of Fig. 3, and Fig. 7 is a similar view showing a modified construction of the'flnishing portion of the vertical air-flue. 1

While the drawings show the preferredembodiment of my invention, I reserve the right .to make such changes in theconstruction shown and described as the scope of the claims hereunto appended will permit. 1

Referring more particularly to the drawings, the reference character 1 represents the bottom plate and 2 the top plate of the base of my stove. These. two plates, together with the outside shell or casing 3, form a basesmoke flue 4. At the rear of'the. stove, and communicating withsaid base-flue there is arranged a descending smokeflue 5, com-- municating with the; combustion chamber,

and a return ascending smoke-flue 6 terrni' Specification of Letters Patent.

Patented Sept. 29, 1908.

Application filedoctober 29, 1906,. Serial 110,341,067.

nating in the chimney opening 6 These vertical smoke-flues are formed by the main back or casing 7 a of the stove and curved flue strips 7 and 8; Said fl'ue strips extend from their juncture 9gat the center of the main back or casing 7 to the side casing or shell wherethe plate 9" forming the rear surface of theash-pit, fire-pot and combustion chamber joins said side casing. The space included between the saidrear surface of the ash-pit, [ire-pot and combustion chamber and the curved flue strips constitutes an air-circulatlng. flue 10. v

. At the line of the smoke outlet or chimney opening 6 the flue strips are brought forward as at 10* to make room fora tea-kettle attachment 10 and the width of the air flue is also contracted making a narrow passage 10. which after passing above the smokeoutlet widens out again and finally terminates in the pipe 11 to supply heated air to a roomabove. This leaves a passage 10 on the leftside of the stove'for the products of I combustion from the fire-pot to pass to the descending flue 5 and a passage 10 on the right side which affords a seat for the direct draft damper 10 As the smoke-outlet is placed at the center of the main back, a strip 1O is employed to carry the top of the ascending flue 6 past the,center of the back so as to communicate with the smoke-outlet as shown in Fig. 6. In the modified construction the circulating flue 10 is carried in a direct lineto the tea-kettle. attachment. The chimney opening 6 is then placed at the top ofthe ascending smoke-flue 6. By this construction, the circulating flue is only contracted sufficiently to make an opening for the direct draft damper 10 and the passage 10 as shown in Fig. 7.

A horizontal air-circulating flue 12 is formed between the top plate 2 of the baseflue 4 and the bottom plate14 of the ash-pit. Openings 15 are formed inthe casing or shell of the stove, said openings communicating directly with the air-circulating flue 12 for the ingressof air; As the bottom plate 14 of the ash-pit does not extend past the plate 9 a passage 16 is left between said plate and the flue-strips 7 and 8 forthe passage of air from the horizontal air-circulating flue 12 to the air-flue 10. The base-smoke flue 4 encircles a hollow flue strip 17 which is 0 en at 18 for the ingress of air from the space elow the base of the stove. The hollow flue strip 17 extends to the main back or casing 7 An opening 18 is arranp'ed in the plate combustion chamber, a hollow line-strip 2, below the passage 16. This allows air to be taken from the floor of the room and fed to the vertical air-circulating flue 10. By this arrangement of air-circulating flues, it Will be seen that all plates that are heated by the products of combustion on one side are in direct contact with cool air on the other side or, in other Words, I have eliminated indirect radiating surfaces and have converted them into direct radiating surfaces. It will be further noted that in accomplishing this result, the area of the smoke-fines has not been reduced, thereby retarding the draft as in previous attempts to increase the radiating powers of heating" stoves, and that the outside exposures or surfaces of the smokeflues, which constitute direct radiating surfaces, have not been decreased. This was the result When the said previous attempts Were made by inc-losing the ascending and descending SlllOliG-fiUGS in air-chambers, that is, valuable direct radiating surface was destroyed and the stove made cumbersome by the additional Weight of material.

I claim:

1. A heating stove provided with a baseflue, descending; and ascending tlues, a horizontal air circulating flue and a vertical aircirculating flue formed entirely by interior plates of the stove, said vertical air-circulating flue communicating with said horizontal air-circulating flue, said air-circulating flues coverin all interior smoke-flue surfaces.

2. A heating stove provided with a baseflue, descending and ascending llues communicating with said base-flue, continuous air-circulating l'lues covering all interior surfaces of said flues and the interior radiating surfaces comprising the ash-pit, fire-pot and said horizontal air-flue for the arranged in said base-flue and extending to the extreme back of the stove, said liue-strip being open to the space below the base of the stove and having connnunieaiion with said air-circulating lines, the easing of the stove between the base-lino and the bottom of the ash-pit being provided with openings therein having communication with said air-eireulau in; lines.

3. A heating stove provided with a baseline, descendinp and ascending lines, a hori zontal aircirculating flue arranged between the said base-flue and the ash-pit, a vertical air-circulating .llue arranged between the interior plates of said descending and ascending lines and the rear plates ol the ash-pit, fire-pot and eondsustien chamber, said vertical air-circulating line having eoninuinieation with the said horizontal air-circulating flue, a hollow flue-stri p connnunieating with said vertical air-flue formed in said b.-rse flue, the casing of the stove being provided with openings therein cennnunieating with Plll'POSU Sl)(('l- 4. A heating stove provided with a wall forming the rear surface of the ash-pit, lirepot and combustion chamber and hm-strips forming the interior plates of a descending and an ascending smoke-flue, said llne-srips extending from their uneture at the center of the main back to the side easing where said wall meets said side casing.

in testimony nlwreol, ll aliix my signature, in presence of two witnesses.

Wllililrliil ROBERT YllCUM/h, .llk.

Witnesses OLIVER C. Wnirn, F. \V. V marrow. 

